Cleaning and maintenance

It’s easy to keep your new bi-fold doors looking and working great. Here are our top tips.

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Caring for your shiny new bi-fold doors

With a little bit of care, attention, and maintenance know-how, it’s easy to keep your bi-fold doors looking sparkling new for years to come. For expert advice on how to keep them looking their best, read on. We’ll also cover how to keep your guarantee valid — so there are no nasty surprises down the road.

Alumium Care

Keeping aluminium in good condition has never been easier.

Simply clean it by wiping it down with a soft cloth. Or if you’re struggling to get rid of stubborn marks, these can be removed with a specialist alumium cleaner.

Just avoid using abrasive products and solvents such as metal polish, glass cleaner, or scouring pads as these may damage the finish.

The bottom track must be kept free of debris and obstructions to operate properly.

What if I want blinds?

If you’d like to install blinds, just make sure that air can flow between the wdoor and the blind. Ask your installer to leave an ideal space of 15mm. If they are attached to the aluminium it can affect your guarantee.

Cleaning your glass

All you need is a non-smear glass cleaner and paper towel.

To keep the glass in your bi-folds looking shiny and streak-free, spray a non-smear glass cleaner directly onto the glass and into the corners of the pane.

Wipe the cleaner away with a paper towel, then turn the paper over to buff the pane until completely dry.

For doors that truly shine, repeat to the outside of the door — you’ll be staring at a sparkling reflection in no time.

External Glass

  • Use soapy water to remove grit and grime
  • Finish off with a glass cleaner
  • Stick to using a soft cloth or paper towel
  • Clean every four months

Internal Glass

  • Finish off with a glass cleaner
  • Stick to using a soft cloth or paper towel
  • Clean once a month

We're backed by a 10-year manufacturer’s guarantee

We’ll cover the cost of any necessary replacement parts if the damage isn’t your fault.

High quality of vision

It’s simple. High quality double glazing means a high quality of vision. As our glass manufacturing follows the Glass and Glazing Federation’s Code of Good Practice, you can expect the following from your bi-fold doors.

Flat transparent glass is acceptable if the following are neither obstructed nor bunched.

  • Fine scratches (no more than 25mm in length)
  • Minute particles
  • Bubbles or blisters

This includes laminated, toughened (tempered), or coated glass.

Note that reflections in double glazing can accentuate visual distortions in toughened glass and laminated glass can sometimes have more blemishes as it is made of layers. These surface patterns and colourations do not affect the physical performance of your bi-folds.

How to check

To properly check your glass, stand no less than two metres away from your bi-folds and look directly through to the other side.
  • If your glass is toughened, laminated, or coated, then stand no less than three metres away from your doors
  • If you can’t stand two (or three) metres away, then stand as far away as possible
  • View the glass facing it straight on, at 90 degrees
  • Check your bi-folds in natural daylight. Don’t look directly towards the sun and ensure there is no visible moisture on the surface of the glass
  • You should exclude a 50mm wide band around the edge of the glass from your check

Types of vision

You should be aware of three different types of vision.

Double reflection

This is caused by multiple surface reflections in double glazing and will be visible in certain light conditions. It will differ according to the specific surface reflections in each pane.

Brewster’s Fringes

The glass refraction of light can sometimes produce small transitory rainbow effects. This can occur when high-quality flat glass sheets are placed parallel to each other.

Patterned glass

As the manufacturing process is different with patterned glass, the above will not apply.

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Hardware and useful info

Maintaining your bi-fold doors is really easy.


If your metal-to-metal joints don’t have nylon bearings then you should lubricate them once a year. Use a light engineering oil such as 3-in-1. Which joints does this include? Friction stays, hinges, gearing mechanisms, espagnolettes, locking mechanisms, and shootbolts.

Lubricate rollers on door bolts, espagnolettes or shootbolt mechanisms that engage with locking keeps once a year using a light grease like lanolin.


Simply wipe with a damp cloth and dry thoroughly to get rid of dirt and dust.

Weather seals

Effective weather seals are crucial if you’re looking to prevent draughts and stop heat escaping from your home. In terms of everyday maintenance, all they need is a clean with a damp cloth now and again. If you find a seal has dislodged from its grooves, just slide it back into position. This will stop damage from occurring.

How to keep your hardware clean

Clean your door furniture every four months.
  • Don’t use abrasive products and solvents such as scouring pads, metal polish, and acetone
  • Use something gentle like a soft duster or a damp chamois leather to wipe away dirt and dust
  • Regular polishing and cleaning shouldn’t be necessary with superior polishings and coating.
  • Regularly lubricating the hardware will not only ensure that your doors operate as they should, but will also lengthen the life of your doors by preventing corrosion.

Cleaning tips

Before cleaning glass, remove all jewellery such as rings, bracelets, and watches that could scratch the surface.

Use the correct cleaning technique for each part of the door, as explained below, to keep them looking as good as new.